Nws yog ib qho tseem ceeb heev kom phim cov kabmob puab txoj kab uas hla nrog cov ncej thiab sab nraud txoj kab uas hla nrog lub vaj tse thaum cov kabmob raug teeb tsa.Yog hais tias qhov haum yog xoob heev, lub mating nto yuav tsim cov txheeb ze zawv zawg, uas yog hu ua creep.Thaum creep tshwm sim, nws yuav hnav tawm ntawm mating nto, puas lub ncej lossis vaj tse, thiab hnav cov hmoov yuav nkag mus rau hauv cov kabmob, ua rau kub, kev co thiab kev puas tsuaj.Kev cuam tshuam ntau dhau yuav ua rau cov kab me me ntawm lub nplhaib sab nraud lossis loj dua sab hauv ntawm lub nplhaib sab hauv, uas yuav txo qhov kev tshem tawm sab hauv ntawm cov kabmob.Tsis tas li ntawd, qhov tseeb geometric ntawm cov ncej thiab lub plhaub ua haujlwm tseem yuav cuam tshuam rau qhov tseeb ntawm cov kabmob ntawm lub nplhaib, yog li cuam tshuam rau kev ua haujlwm ntawm cov kabmob.
1.1 Kev xaiv haum 1.1.1 Qhov xwm txheej ntawm kev thauj khoom thiab kev xaiv ntawm kev haum yog txiav txim siab raws li kev coj tus kheej bearing load kev taw qhia thiab kev sib hloov ntawm lub puab thiab sab rings, feem ntau yog xa mus rau Table 1. Table 1 thiab load thiab load bearing rotating tej yam kev mob illustrations nrog lub nplhaib puab: tsis zoo lem: static load kev taw qhia: tsau puab nplhaib spinning load puab nplhaib, txheej nplhaib static load siv qhov cuam tshuam haum (kev cuam tshuam haum) lub nplhaib sab nraud: muaj khiav haum (clearance) puab nplhaib: zoo li qub lub voj voog tsis zoo: kev sib hloov kev taw qhia ntawm lub load, thiab lub nplhaib sab nraud thiab lub nplhaib sab hauv: tsis zoo lem: static load kev taw qhia: tsau puab nplhaib static load puab nplhaib, txheej nplhaib spinning load muaj khiav haum (clearance) lub nplhaib sab nraud: SIV qhov cuam tshuam haum (kev cuam tshuam haum) puab nplhaib: zoo li qub tsis zoo lub voj voog: rotary load kev taw qhia: nrog lub nplhaib puab spinning tib lub sijhawm.2) Pom zoo kom xaiv haum haum, bearing load yam ntxwv, loj, kub tej yam kev mob, bearing installation, tshem tawm ntau yam mob.Thaum cov kabmob yog mounted rau nyias-walled plhaub thiab hollow ncej, qhov cuam tshuam tus nqi yuav tsum tau loj dua li cov zoo tib yam.Lub plhaub sib cais tuaj yeem yooj yim deform lub nplhaib sab nraud ntawm cov kabmob, yog li lub nplhaib sab nrauv yuav tsum tau siv ua tib zoo nyob rau hauv cov xwm txheej ntawm kev sib koom tes zoo li qub.Nyob rau hauv cov ntaub ntawv ntawm kev co loj, lub nplhaib puab thiab lub nplhaib sab nrauv yuav tsum tau txais kev sib koom tes zoo li qub.
Koom tes nrog cov lus pom zoo tshaj plaws, xa mus rau lub rooj 2, rooj 3 lub rooj 2 centripetal bearing thiab ncej nrog cov xwm txheej siv tau (siv) txoj kab uas hla ntawm qag (mm) spherical roller bearing remark ball bearings cylindrical roller bearings taper roller bearings automatic self- aligning cov menyuam bearing cylindrical qhov bearing txheej nplhaib thiab ncej rotation load xav tau lub nplhaib puab ntawm lub ncej yog yooj yim rau txav zoo li qub qag log tag nrho cov loj g6 precision yuav tsum, Nrog g5, h5, bearing thiab pab txhawb mobile yuav tsum tau h6 kuj muaj nyob rau hauv tsis muaj puab nplhaib yog ib qho yooj yim. txav lub log nro h6 sab hauv lub nplhaib spinning ncej, hlua puag ncig lossis kev taw qhia ntawm qhov sib txawv ntawm lub teeb load 0.06 Cr (1) load sib txawv load khoom siv, twj tso kua mis, blower, tsheb, precision machinery, tshuab cuab tam hauv qab 18 - Js5 raug thaum xav tau los ntawm qib ntawm p5, puab txoj kab uas hla siv precision pob bearing nyob rau hauv 18 hli h5.Common load (0.06 ~ 0.13) Cr (1) General bearing ib feem ntawm nruab nrab thiab loj lub cev muaj zog turbine, twj tso kua mis, cav spindle, gear kis tau tus mob, woodworking machinery nyob rau hauv 18 - N6 ib kab tapered menyuam bearings thiab ib-kab radial thrust pob bearings siv tau k6, M6 hloov K5, M5.P6 140-200 40-65 R6 200-280 100-140 N6 - 200-400 140-280 P6 - 280-500 R6 - Tshaj 500 R7 hnyav load (tshaj 0.13Cr (1)) railway thiab industrial tsheb fais fab Cov tswv tsheb fais fab kev tsim kho tshuab crusher - 50-140 50-100 N6 Xav tau ntau tshaj qhov kev tshem tawm ntawm cov kabmob - p6, 140-200, 100-140 - ntau tshaj 200, 140-200 r6 - 200-500 r7 tsuas yog nqa axial load ntawm qhov chaw ntawm cov qauv bearing siv qhov chaw tag nrho qhov ntev Js6 (j6) - rooj 3 centripetal bearing nrog lub plhaub qhov xwm txheej muaj feem xyuam rau cov xwm txheej (siv) qhov kev txav ntawm lub nplhaib sab nraud qhov kam rau ua ntau qib kev ceeb toom tag nrho lub plhaub qhov phab ntsa bearing lub nplhaib sab nraud spinning thauj khoom hnyav tsheb log rau cov menyuam bearings (crane) taug kev txoj kev log P7 lub nplhaib sab nraud mus rau axial kev taw qhia.
Lub cev nyhav, hnyav lub tsheb log (pob bearings) shaker N7 lub teeb load lossis hloov load conveyor siv nro pulley log, pulley M7 tsis yog tus tswv ntawm kev taw qhia load loj cuam tshuam load trolley load lossis lub teeb load ntawm lub twj tso kua mis crankshaft spindle loj lub cev muaj zog K7 lub nplhaib sab hauv Lub hauv paus ntsiab lus tsis mus rau axial kev taw qhia ntawm lub nplhaib sab nrauv tsis tas yuav tsum tau mus rau axial kev taw qhia ib hom plhaub qhov los yog sib cais hom plhaub qhov ib txwm load lossis lub teeb load JS7 (J7) lub nplhaib sab nraud yuav tuaj yeem txav mus rau axial xav tau lub nplhaib sab nraud rau axial kev taw qhia ntawm lub nplhaib sab hauv spinning load ntawm txhua yam ntawm cov kabmob ntawm cov kabmob dav dav ntawm lub tsheb ciav hlau H7 lub nplhaib sab nraud mus rau qhov kev taw qhia axial yooj yim - ib txwm thauj lossis lub teeb thauj khoom npaj ushering hauv plhaub ncej thiab cov kabmob H8 tag nrho lub voj voog rau hauv kev thauj khoom, Kev kub ceev ntawm daim ntawv ua tshuab ziab khaub ncaws G7 lub teeb load, tshwj xeeb tshaj yog xav tau kev sib tsoo spindle kev sib hloov nyob rau sab nraum qab ntawm lub pob bearing high-speed centrifugal compressor tsau sab bearing JS6 (J6) lub nplhaib sab nraud rau lub axial kev taw qhia - tsis qhia cov kev taw qhia load rau tom qab. ntawm lub pob bearing sib tsoo spindle high-speed centrifugal compressor K6 taag sab bearing txheej nplhaib tsau nyob rau hauv lub axial kev taw qhia ntawm lub load nyob rau hauv lub hauv paus ntsiab lus, muaj feem xyuam rau tus nqi ntawm kev cuam tshuam nrog loj dua K, tshwj xeeb uas yuav tsum tau nyob rau hauv lub siab precision, me me tso cai. fits yuav tsum tau siv ntxiv rau txhua lub hom phiaj.
Lub nplhaib puab spinning load sib txawv load, tshwj xeeb tshaj yog xav tau precision rotation thiab loj rigidity ntawm lub tshuab cuab tam spindle nrog M6 los yog N6 cylindrical cov menyuam bearing txheej nplhaib tsau nyob rau hauv lub axial kev taw qhia rau noiseless kev khiav hauj lwm cov khoom siv hauv tsev H6 txheej nplhaib mus rau axial kev taw qhia - 3), precision ntawm lub axis, lub hood, thiab qhov roughness axis, lub hood precision tsis zoo, bearing cuam tshuam los ntawm nws tsis tuaj yeem tso saib qhov kev ua tau zoo.Piv txwv li, lub installation ntawm ib feem ntawm lub xub pwg nyom yog tsis zoo, lub puab thiab sab rings yuav inclined.Ntxiv nrog rau cov kabmob load, ua ke nrog cov concentrated load thaum kawg, cov kabmob qaug zog lub neej yuav raug txo, thiab hnyav dua, nws yuav ua rau lub tawb puas thiab sintering.Tsis tas li ntawd, lub plhaub deformation vim kev thauj khoom sab nraud tsis loj.Nws yog ib qho tsim nyog los txhawb nqa qhov rigidity ntawm cov kabmob.Qhov siab dua qhov rigidity, qhov zoo dua lub suab nrov thiab kev faib tawm ntawm cov kabmob.
Nyob rau hauv dav dav ntawm kev siv, tig kawg machining los yog precision tho txawv tshuab ua tau.Txawm li cas los xij, rau lub sijhawm uas yuav tsum tau ua nruj me ntsis ntawm kev sib hloov thiab lub suab nrov thiab cov xwm txheej hnyav hnyav heev, kev sib tsoo zaum kawg yuav tsum tau siv.Thaum ntau tshaj 2 bearings yog teem nyob rau hauv tag nrho cov vaj tse, lub vaj tse mating nto yuav tsum tau tsim los machined thiab perforated.Nyob rau hauv cov xwm txheej ntawm kev siv, ncej, vaj tse precision thiab tiav yuav ua tau raws li qhia nyob rau hauv Table 4 hauv qab no.Table 4 Axis thiab Housing Accuracy thiab Finish Of bearings - Class AXIS enclosure roundedness tolerances - class 0, class 6, class 5, class 4 IT3 ~ IT42 2IT3 ~ IT42 2 IT4 ~ IT52 2IT2 ~ IT42 2 Cylindricity tolerances , chav kawm 5, chav kawm 4 IT3 ~ IT42 2IT2 ~ IT32 2 IT4 ~ IT52 2IT2 ~ IT32 2 Lub xub pwg runout tolerances - chav kawm 0, chav kawm 6, chav kawm 5, chav kawm 4 IT3IT3 IT3 ~ IT4IT3 Matching nto tiav Rmax 3 cov kabmob loj.2 cov kabmob loj. 3s 6.3 ib 12.5s.
Lub npe hu ua kev tshem tawm sab hauv ntawm cov kabmob yog hais txog tus nqi ntawm kev txav mus los thaum lub nplhaib sab hauv lossis sab nraud ntawm cov kabmob raug kho ua ntej cov kabmob mounted ntawm lub ncej lossis lub thawv bearing, thiab tom qab ntawd sab tsis ruaj yog txav mus rau hauv radial lossis axial kev coj. .Raws li kev txav mus los, nws tuaj yeem muab faib ua radial clearance thiab axial clearance.Thaum ntsuas qhov kev tshem tawm sab hauv ntawm cov kabmob, txhawm rau txhawm rau ntsuas tus nqi ruaj khov, qhov ntsuas qhov ntsuas feem ntau yog siv rau ntawm lub nplhaib.Yog li ntawd, qhov ntsuas tus nqi yog loj dua qhov tseeb clearance tus nqi, uas yog, ib qho ntxiv ntawm elastic deformation tshwm sim los ntawm kev siv lub xeem load.Tus nqi tiag tiag ntawm bearing internal clearance yog qhia nyob rau hauv Table 4.5.Qhov nce ntawm clearance tshwm sim los ntawm saum toj no elastic deformation yog kho.Lub elastic deformation ntawm cov menyuam bearings yog negligible.Table 4.5 kom tshem tawm cov kev cuam tshuam ntawm radial clearance test load kho (qhov tob groove pob bearing) units: um nominal bearing qauv txoj kab uas hla d (mm) (N) clearance test load kho dua rau C2 C3 C4 C510 zoo tib yam (suav nrog) 18 24.549 147 3 ~ 4 4 ~ 5 6 ~ 8 45 8 4 6 9 Lub Plaub Hlis 9 Lub Plaub Hlis 6 92.2 kev xaiv ntawm cov kabmob clearance bearing khiav clearance, vim cov kabmob haum thiab qhov kub ntawm qhov sib txawv ntawm sab hauv thiab sab nrauv, feem ntau yog me dua qhov pib clearance.Kev khiav hauj lwm clearance yog ze ze rau lub neej bearing, kub nce, vibration thiab suab nrov, yog li nws yuav tsum tau teem rau lub zoo lub xeev.
Kev hais lus theoretical, thaum lub bearing yog nyob rau hauv kev khiav hauj lwm, nrog me ntsis tsis zoo khiav clearance, lub bearing lub neej yog siab tshaj plaws.Tab sis nws yog ib qho nyuaj heev los tswj qhov kev pom zoo no.Nrog rau kev hloov pauv ntawm cov kev pabcuam, qhov kev tshem tawm tsis zoo ntawm cov kabmob yuav nce ntxiv, uas yuav ua rau muaj qhov txo qis ntawm kev coj tus kheej lub neej lossis kev tsim cov cua sov.Yog li ntawd, thawj qhov kev tshem tawm ntawm cov kabmob feem ntau tau teeb tsa me ntsis ntau dua li xoom.FIG.2 variation ntawm bearing radial clearance 2.3 Xaiv cov qauv rau Bearing clearance Theoretically, bearing lub neej yog maximized thaum muaj ib tug me ntsis tsis zoo kev khiav hauj lwm clearance nyob rau hauv kev nyab xeeb kev ua hauj lwm tej yam kev mob.Tab sis nyob rau hauv kev xyaum, nws yog ib qho nyuaj heev kom tswj tau qhov zoo tshaj plaws mob.Thaum qee qhov kev pabcuam hloov pauv, qhov kev tshem tawm tsis zoo yuav nce ntxiv, ua rau muaj kev poob qis hauv lub neej lossis cua sov.Yog li ntawd, thaum thawj qhov kev tshem tawm feem ntau yog xaiv, qhov kev khiav hauj lwm clearance yuav tsum tsuas yog me ntsis ntau dua li xoom.
Rau cov kabmob nyob rau hauv ib txwm muaj, kev sib koom ua ke ntawm cov khoom thauj khoom yuav raug saws.Thaum qhov ceev thiab qhov kub thiab txias yog qhov qub, qhov sib thooj sib thooj yuav tsum raug xaiv kom tau txais kev khiav hauj lwm tsim nyog clearance.Table 6 zoo tib yam clearance piv txwv li siv tej yam kev pab cuam lub sij hawm clearance nyob rau hauv hnyav load, cuam tshuam load, cuam tshuam nrog loj npaum li cas ntawm railway tsheb qag C3 vibrating screen C3 thiab C4 tsis tuaj yeem them taus lub directional load, sab hauv thiab sab nraum lub voj voog ntawm C4 tsheb laij teb txais zoo li qub nrog railway tsheb traction lub cev muaj zog, reducer lossis C4 bearing puab nplhaib kub ntawv tshuab, tshuab ziab khaub ncaws C3 thiab C4 zeb rau cov menyuam kun C3 kom txo tau kev vibration thiab suab nrov ntawm micro-motor C2 clearance kho thiab tswj kev vibration ntawm ncej NTN spindle (ob kab cylindrical cov menyuam bearing) C9NA, C0NA.
Post lub sij hawm: Jul-30-2020